1. National Centre for PTSD

Information about PTSD and other disorders and problems associated with trauma, including a quick self test to screen for PTSD, a description of some treatment options, and advice related to coping with trauma and/or finding a qualified therapist.

2. International Society for Traumatic Stress Studies

"An international, interdisciplinary professional organization that promotes advancement and exchange of knowledge about traumatic stress."

3. Canadian Psychological Association's Traumatic Stress Section

Organization with a mission to "promote evidenced-based mental health assessment and treatment, educate the public about the importance of appropriate traumatic stress treatment and research, and actively encourage the involvement of appropriate public and private sector agencies in the development of effective policies and procedures to address the psychological effects of traumatic stress within the Canadian population."

4. American Psychological Association's Division 56: Trauma Psychology

"Psychology's focal point for research, practice, policy development and education on trauma."

5. International Society for the Study of Trauma and Dissociation

"ISSTD seeks to advance clinical, scientific, and societal understanding about the prevalence and consequences of chronic trauma and dissociation."

6. Dr. Jennifer Freyd's Dynamics Lab

A wealth of information related to trauma, betrayal, dissociation, and related topics, with links to many full text research articles and online archives.